The Lederburg-Zinder experiment using Salmonella after placing two auxtrophic strains on opposite sides of a Davis U-tube, Lederburg and Zinder recovered prototrophs from one side of the tube. They actually discovered a process of bacterial recombination mediated by bacteriophages and now called this.

Considering the structure of double-stranded DNA, what kinds of bonds hold one strand that is complmentary to the other?

Homologous recombination

The Holliday model refers to....and involves single strand breaks.

13

The normally cultivated cotton plant is a tetraploid (52 chromosomes). How many chromosomes did the probable ancestral haploid have?

Triploidy

When an organism gains or loses one or more chromosomes but not a complete haploid set, the condition is know as this.

Clear zone

The clearing made by bacteriophages in a "lawn" of bacteria on an agar plate is called a....

The introns have been spliced out during mRNA processing

It has been recently determined that the gene for Duchenne muscular dystrophy (DMD) is over 2000kb (kilobases) in length, however, the mRNA produced by this gene is only about 14 kb long. What is the likely cause of this discrepancy?

H1

Chromatin of eukaryotes is organized into repeating interactions with protein octamers called nucleosomes. All of the following histones make up nucleosomes except this one.

Fixed point of initiation, bidirectional, semiconservative

Which cluster of terms accurately reflects the nature of DNA replication in prokaryotes?

Telomerase

This is an RNA-containing enzyme that adds telomeric DNA sequences onto the ends of linear chromosomes.

Promoter recognition

Sigma factors are responsible for one of the following processes during prokaryotic transcription.

5'-capping, 3'-poly(A) tail addition, and splicing

Most accurately describes posstranscriptional modifications often seen in the maturation of mRNA in eukaryotes.

Heterochromatin and euchromatin

Eukaryotic chromosomes contain two general domains that relate to the degree of condensations. These two regions are called?

An intron

This is a section of RNA that is removed during RNA processsing

Autopolypoidy

Which term specifically refers to the gain of extra chromosome sets form individuals of the same species?

A+C=G+T

In an analysis of the nucleotide compostion of double-stranded DNA to see which bases are equivalent in concentration, which of the following would be true?